How to Buy and Use RF Remote Control Modules - Control Any Electrical Gadget Remotely

Aug 26, 2012

Remote controls have always been an intriguing device for all of us because of one good reason: It allows us to operate distant gadgets with a flick of a button, without having to move an inch. Today with the advancement of technology remote control switches have become accessible very easily from the market and we can buy such units quite cheaply and install them as per our own specific needs.

DC Cell Phone Charger Circuit Using a Single Transistor

Aug 25, 2012

The following circuit of a DC cell phone charger is probably the simplest in its forms and may be built very cheaply and used for charging any standard cell phone from a DC 12 volts external source.

Making a Programmable Timer Circuit Using a Digital Clock

Aug 21, 2012

I have already discussed one programmable timer circuit in this blog earlier, the circuit involves the IC 4060 for generating the basic oscillations which is further used for generating the required time intervals, however this cannot be synchronized with an external clock. The following circuit was requested by Mr.Amit, here the concept makes use of a clock for acquiring the required base timing oscillations and therefore is able to get synchronized with external clocks or watches.


Aug 20, 2012

The TDA7560 is a cutting-edge BCD (Bipolar / CMOS / DMOS) technology class AB Audio Power Amplifier in Flexiwatt 25 package made for super high power car radio.

Make this 48V Automatic Battery Charger Circuit

Aug 15, 2012

The following article explains a very simple yet effective 48v automatic battery charger circuit, utilizing very ordinary components. The circuit is highly accurate with  its over charge cut off features.

Simplest Mains Operated LED Flasher Circuit - Astable Multivibrator Circuit

The following mains operated LED flasher circuit which is actually an astable multivibrator circuit utilizes only a diac and resistor arrangement for implementing interesting wig wag flashing of two LEDs. The circuit was shared with me by Mr.Vineesh, who is one of the keen followers of this blog. I would like to present the email that was sent to me by Mr.Vineesh.

High Current Transformerless Power Supply Circuit

Aug 13, 2012

The simple configuration of a transformerless power supply circuit presented below is able to provide high current at any assigned fixed voltage level. The idea seems to have solved the problem of deriving high current from capacitive power supplies which earlier seemed a difficult proposition. I assume I am the first person to have invented this.

Making a Flexible Programmable Timer Circuit

Aug 12, 2012

This circuit of a flexible programmable timer circuit explained in this article was designed by me in response to a request by Mr.Amit. Let's know more about the request and the circuit details.

LED Emergency Light Circuit With Battery Over Charge Protection

The following circuit was designed by me in response to the request sent by PP. The article describes an LED emergency light circuit with advanced features such as, over charge battery cut off, day time auto-disable, and need less to say that the circuit switches ON the LEDs automatically when AC mains fails and reverts to charging mode when power is restored.

Making a 220v to 110V Transformerless Converter Circuit

Aug 10, 2012

The presented circuit has been taken from an old elektor electronic magazine which describes a neat little circuit for converting 220V mains input to 110V AC. Let's learn more about the circuit details.

Make a Room Air Ionizer Circuit - Get a Pollution Free Environment Right In Your Home

Aug 8, 2012

Have you ever thought or wondered why atmosphere over hill stations and other similar places which are far away from modern cities give you a feeling of  freshness and good health? The answer is simple, the air in such places are free from pollutants and  harmful chemicals like smoke and gases. Well, if you are settled in one of those cities which is engulfed with bad air and if you have compromised with the situations, here's your chance to get rid of the situation through the circuit explained below:

Simple Intercom Circuit

Aug 7, 2012

The article presented below describes a very simple intercom system which can be built and installed at any required place very cheaply. The circuit utilizes just a single IC and a very few other components for the entire assembly.

LM386 Amplifier Circuit Explained

Aug 6, 2012

The IC LM386 is a 8-pin tiny power amplifier chip, specially made for operating under relatively low voltage parameters, yet provide considerable amplification. IC LM386 amplifier circuit becomes suitable for applying in small low power audio gadgets like in FM radios, door bells, telephones etc.

Battery Charger Circuit Problems Discussed

Aug 5, 2012

The included circuit was designed and built by Mr.Vinod Chandran, however there's some issue with the circuit which has been addressed in this article. Let's learn the discussion between Vinod and me.

Automobile Head Light Dipper, with Cell Phone Charger Circuit

Aug 4, 2012

The following circuit was designed by me in response to the request sent by Miss. Surya. Actually the presented idea is a combination of three circuit designs already posted in this blog with different titles, they have been integrated together to fulfill the requested design. To see the request sent by  Miss Surya you may refer here.

Make a Football Electricity Generator Circuit

Aug 1, 2012

The explained football electricity generator circuit was developed by me in response to the request sent by one of the readers Mr.Bright. Though I am not sure if the explained concept would actually give the intended results, it's worth trying as it's quite easy to understand and build.

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